An organism's scientific name identifies the
and thein which the organism belongs.
A
genus, species
B
order, genus
C
family, species
D
class, order

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Which blood cell spend most of their time in the lymphatic system?

How can an organ, such as the lungs, work for multiple body systems?